| All Patents in class 451/200 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 8,929 | May 04, 1852 | W. Southwell | Machinery for grinding or polishing saw-blades, &c. | tool making |
| 390,931 | Oct. 09, 1888 | B.D. Whitney | Sharpening-machine | industrial machine gearing |
| 407,721 | Jul. 23, 1889 | J.D. Cox, Jr. | Machine for back-clearing twist-drills | tool making machines |
| 562,268 | Jun. 16, 1896 | F. Ashton | Apparatus for Grinding Parallel Spindles Rods or Shafts | cylindrical grinders |
| 2,032,589 | Mar. 03, 1936 | E.A. Overstedt | Gear Lapping Machine | gear lapping machines |
| 2,232,408 | Feb. 18, 1941 | S.M. Shaw | Gear Finishing Machine | gear making machines |
| 2,304,580 | Dec. 08, 1942 | J.M. Luers | Grinding Machine | grinding machines |
| 2,452,976 | Nov. 02, 1948 | F.R. Whitcomb | Roll adjusting mechanism | polishing and buffing machinery |
| 2,505,223 | Apr. 25, 1950 | F.R. Whitcomb | Glazing and polishing machine | polishing and buffing machinery |
| 2,544,625 | Mar. 06, 1951 | F.R. Whitcomb | Work holder | polishing and buffing machinery |
| 2,561,004 | Jul. 17, 1951 | W.G. Baldenhofer, J.C. Wilson | Method and Apparatus for Grinding | surface grinders |
| 2,578,531 | Dec. 11, 1951 | C.H. Drury, E.V. Flanders | Machine for Grinding Impeller Bucket Shanks | profile and contour grinders |
